Header for steam-boilers



(No Moda.) l a sheets-sheet 1. W. E. KELLY. EEADEE EOE STEAM EOILEES'.

No. 423,932. Patented Mar. 25, 1890.

' 2. n WWII-IWA (No Model.)l 3 Sheets-Sheet 2. W. E. KELLY. HEADER POR STEAM BOILBRS.

No. 423,932.` v y Patented Mar. 25, 1890.

am zz 3 Sheets-Sheet 3.

W. E.Y KELLY. l HEADER FOR STEAM BOILERS'l (No Model.)

Patented Mar. 25, 1890.

UNITED STAT-ns PATENT FFICE.

VILLIAM E. KELLY, OF .NEV BRUNSVICK, NEX/V JERSEY.

H EADER FOR STEAM-BOILERS.

'SPECIFICATION forming part of Letters Patent No. 423,932, dated March 25, 1890.

Application filed August 13, 1888. Serial No. 282,613. (N o model.)

To all whom it may concern:

Beit known that I, WILLIAM E. KELLY, of New Brunswick, in the county of Middlesex, in the State of New Jersey, have invented a certain new and useful Improvement in Headers for Steam Boilers or Generators, of which the following is a specification.

I will describe a header embodying my iini provement in detail, andrthen point out the various novel features in the claims.

In the accompanying drawings, Figure lis a front view of a header embodying my improvement. This header has two covers. One is removed, so that the interior of that portion of the header covered by it may be seen. Fig. 2 is a vertical section taken at the plane of the dotted line Qc w, Fig. l. Fig. 3 is a transverse section taken at the plane of the dotted line y y, Fig. 2. Fig. 4 is afront view of a header of another shape embodying my improvement, the cover being removed. Fig. 5 is a front vievs7 of anheader corresponding to Fig. l, but illustrating a modification. Fig. 6 is a vertical section of this header taken at the plane of the dotted line ,c c', Fig. 5. Fig. 7 is a horizontal section taken at the plane of the dotted line w w, Fig. 5. Fig. S is a section taken at the plane of the dotted line 'u c, Fig. 5. Fig. 9 is avertical section of a corner portion of a header, a cover therefor, and means for securing the cover. In this view a modification is illustrated. Fig. l0 is a view corresponding to Fig. 9, but illustrating another modification. Fig. 1l is a front view of a header of another form embodying the improvement. Fig. l2 is atransverse section of the header shown in Fig. 1l, taken at the plane of the dotted line u u, Fig. 11. Fig. 13 is a horizontal section of this header taken at the plane of the dotted line t t, Fig. ll.

Similar letters of reference designate corresponding parts in all the figures.

A designates a header. This header in all the figures, excepting only Fig. 4, is approximately of rhomboidal shape, having parallel top and bottom a a2, parallel inclined side portions as a4, vertical side portions a5 a6 above the inclined side portions, and vertical side portions al a8 below the inclined side portions. Each header has a partition a9. Each header is divided by said partition into two substantially triangular compartments,

here shown as communicating With each other through openings in the partition.

The form of header shown in Fig. 4 corresponds with one of the compartments of the rh-omboidal header, being substantially of triangular shape. Each of the rhomboidal headers has tWo triangular openings 0,10. The fronts of the headers adjacent to these openings are faced suitably to receive covers A of triangular shape. It will be seen that the triangular openings of each of these headers are reversed, so that the apex of one will extend upwardly and a corresponding angle or corner of the other will extend downwardly. The header illustrated in Fig. 4 has one triangular opening al@ and one cover A.

Tubes B are secured to the backs of the headers. These tubes will preferably be secured to the headers by being expanded into the same. lt will be seen that there are six of these tubes secured to each of the rhomboidal headers and that they are so disposed as to be staggered; lt will be observed that three of the six are opposite each of the triangular openings of the header. The triangular header illustrated in Fig. Lthas three tubes secured to it. These tubes are disposed in the position of the apices of a triangle and are opposite the triangular opening in the frontof the header.

Referring first to the example of my improvement which is illustrated in Figs. l to 4, inclusive, it Will bey seen that the inner surfaces of the sides and bottom are provided with pockets for receiving the heads of bolts C, extending through the covers A', and provided outside the latter with nuts C for securing them in place. The bolts C are What are known as T-bolts, having heads which, as here shown, extend transversely beyond the bodies of the bolts in two directions, and at the intermediate sides are iiush With the body of the bolt. The heads may, however, be of any desired shape. The pockets for these bolts consist of cavities c, having openings at the inner sides, or, in other words, toward the center of the header. These cavities are of a size to receive the heads of the T-bolts. The heads of the T-bolts are capable of being slipped into these cavities if the bolts, after having their heads placed opposite the cavities, are moved laterally or to- IOO ward the exterior of the headers. A recess c extends from each cavity c toward the front of the header. It will therefore be seen that the pockets are substantially of T shape. The recesses c are oi' a size to accommodate the portions of the bodies of the bolts which are adjacent to the heads. The cavitiesc extend forwardly some distance into the sides of the recesses c behind lips or flanges c, The bolts may therefore be slipped sidewise into the pockets and then drawn forwardly. lVhen drawn forwardly, they will be prevented from any lateral movement, and hence will be firmly secured in place.

It will be seen that the backs of the cavities c form stops C2, which will limit the rearward movement of the bolts. These stops are not, however, absolutely necessary. The pocket-s on the bottoms of the headers are not shown as provided with backs; but the 'upper ends of nipples D, which connect one header with the header immediately above it, will serve as stops for the bolts engaged with these bottom pockets. The back of each header may be strengthened by ribs c5, extending to those pockets which are on the sides oi the headers, as shown. These ribs are,o1- course, only essential for strei'igthening the header.

It will be seen that I provide for fastening the covers by bolts secured to the headers a short distance rearward of the covers. I provide for securing the covers to the headers at points close to the edges of the covers, so that little or no liability will be incurred of breaking the covers by applying undue force to the nuts. As the bolts are very short, owing to the fact that they are secured to the headers but a short distance from the covers, the danger ordinarily arising from difierential expansion and contraction in the bolts and headers is practically obviated. The bolts, when secured in the ordinary manner to the backs of the headers, are longer than the extension of the sides of the headers in the direction of the length of the bolts. As

`wrought-iro1'i expands and contracts more than cast-iron, much danger arises from this ordinary arrangement and use of bolts.

Turning now to the example of myimprovement which is illustrated in Figs. 5, G, 7, and S, it will be seen that instead of having pockets in the headers for receiving protuberances or heads upon the bolts, I provide the bolts with eyes to receive protuberances extending from the interior of the headers. It will be seen that the bolts C, which extend from the sides of the headers and partitions, are provided with eyes c, and that the sides of the headers and partitions are provided with protuberances or bosses c3, over which,

the eyes of the bolts may be slipped. It will be seen that the bottoms of the headers are provided with protuberances c4, extending around the holes in which the nipples D lit, The eyebolts which extend from the bottoms ot the partitions have their eyes made large enough to lit around these protuberanees c". As the eyes of these bolts,which are combined with the protuberanees c4, lit tightly around the latter, they serve to strengthen the header in so far as they resist the breaking of the header transversely to the protuberanees. The protuberances themselves tend to secure the same advantage.

I may provide the header with a number of lugs cast integral with it and extending inwardly from the front opening or openings. These lugs will be inthe position of the bolts in the other examples of my improvement. In Fie. 0 I have illustrated this modiiication, although I have here shown but one of the lugs. I have designated this lug by the letter c. It has a hole in it so that it forms a pocket. An ordinary bolt (l has its shank extended through the hole of this pocket or lu r while its hea-d bears against the rear of i the lug. The bolt extends through the cover and has a nut C applied to it outside of the cover.

Instead ol providing the bolt C with a head behind thelug or pocket 0,1 may provide the rear end of the bolt with a screw and engage the screw with a female screw-thread in the lug or pocket, as illustrated in Fig. l0. The bolt will extend through the cover and have a nut applied to the Outer end. i

In Figs. 1l, l2, and 13 Iv have shown a long rectangular header provided with removable covers extending across openings, cach of which is located opposite theends of two tubes B. Bolts C are secured to these headers. These bolts are secured to pockets corresponding exactly with the pockets shown in Figs. l, 2, 3, and et. Obviously the bolts which I have described might be hinged to the side walls of the headers and occupy the same positions as they occupy in the examples of my improvement in which they have been illustrated.

The same advantages inure in this example ol my improvement as in the other.

In order to obviate the necessity for frequently removing the covers of the headersI provide said covers with an observation-hole CZ, or a number of such holes. As shown, each observation-hole is located opposite one oi' the water-tubes. It has tted to it a removable stopperd. In. the presentinstanee this stopper is made in the form of a screw-threaded plug having a flange at the base of the head. The body of the plug engages with a screwthread in theinteriorof the hole. The flange enters a recess at the outer end of the hole and lits against a packing d2 in the back of the recess. The cover may be of other form.

A single observation-hole for each cover may be suliicient when located at the apex of a triangular cover applied to headers such as I have described. The observation-hole of one cover will be opposite a tube in one row and the observation-hole ol the next cover will be opposite a tube in another row.

Although thc observation-holes will not af- IOO IIO

ford an opportunity for inspecting all the tubes, yet they will provide for an inspection .of tubes in the'several rows, and as the concovers are taken off andY reapplied it is not easy to reapply them in exactly the same condition that they were before removal.

Of course my improvement in securing the covers of the headers and in aording an opportunity for inspecting the tubes is not rey -stricted to the precise forms of headers which I have illustrated, but are applicable to various forms of headers in use.

What I claim as my invention, and desire to secure by Letters Patent, is-

l. The combination, with a header and a cover therefor, of a number of short bolts having their heads engaging with pockets on the inner side walls near the front of the header, and said bolts extending from the interior of the header through the cover at points adjacent to its edge, substantially as specified.

2. The combination, with a header and a cover therefor, of bolts extending from the interior of the header through the cover, the bolts having heads and the interior of the sides of the header being provided with pockets, whereby they are detachably secured to. gether, and stops in the rear of said pockets, substantially as speciied.

3. The combination, with a header and a cover therefor, of bolts extending from the interior of the header through the cover, said bolts having their heads engaging with the inner side Wall of the header, whereby the bolts and header are detachably secured together,and strengthening-ribs in the header extending between the points where the boltheads are attached to the header, substantially as specied.

et. The combination, with a header and a cover therefor, of an observation-hole in the fied.

WILLIAM E. KELLY. Witnesses:

C. S. ATKINSON, C. BoNTEooU SMITH. 

